TR86 monitor keeps flashing on/off(by monitor i mean the display that has engine rpm,speed, etc, in digital read out. also has rotor,unloading elevator etc. on it) It works them beeps flashes off then starts up again and works fine for a while.
I have the same problem on a TR97. Relay was bad so I swapped it with another and soon it went bad. Realized it may be the stone door switch as it would come on and off a lot then the whole system went out. I must have a bare wire or two and I assume it shorts the system. Worked perfectly yesterday and today though but it finally rained so I need to check that out.